#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2018-12-05 17:36
# @Author  : 少爷

lower = int(input('www.iplaypy.com 请您输入区间最小值: '))
upper = int(input('www.iplaypy.com 请您输入区间最大值: '))

for num in range(lower, upper + 1):
    if num > 1:
        for i in range(2, num):
            if (num % i) == 0:
                break
        else:
            print (num)
